Quiz 6 Flashcards
A. Round Seg
B. Flat Top
C. Ultex A *
D. Ribbon Seg
Which type of bifocal has the least image jump?
A. FT 25
B. Round 22
C. Ultex A
D. Executive *
Excessive prism base down will cause the client to see:
A. the floor appears as if concave
B. as if they are standing in a hole and walking uphill
C. vertical objects as being taller than they are
D. all of the above *
When light strikes a prism, it will deviate toward the ________________ while the image will be displaced toward the ______________.
A. Apex/Base
B. Apex/Apex
C. Base/Apex *
D. Base/Base
The two ways a prism must be expressed in relationship to a prescription are:
A. prism axis, prism decentration
B. prism dioptric power, base direction *
C. amount of decentration, power of lens
D. power in 90th meridian, base direction
A. X = 1.7^ BU Y = 4.7 BO
B. X = 4.7^ BO Y = 1.7^ BD *
C. X = 5.0^ BO Y = 5.0^ BD
D. X = 1.7^ BI Y = 4.7^ BO
Which type of bifocal has the greatest thickness?
A. FT 25
B. Round 22
C. Ultex A
D. Executive *
A. Baseball lens
B. Round Seg *
C. Flat Top
D. Ribbon Seg
For the following, calculate the amount of image jump the client will experience:
Round 28 bifocal, Add: +1.50
Image Jump=
A. 2.1 prism diopters *
B. 21 prism diopters
C. 4.2 prism diopters
D. 5 prism diopters
A. 5 prism diopters at 150 degrees
B. 3.6 prism diopters at 136 degrees
C. 5 prism diopters at 150 degrees
D. 3.6 prism diopters at 124 degrees *
Image jump of a bifocal add causes the image to jump:
A. Up *
B. Down
C. In
D. Out
For the following, calculate the amount of image jump the client will experience:
Ultex A bifocal, Add: +2.00
Image Jump=
A. .5 prism diopters
B. 38 prism diopters
C. .45 prism diopters
D. 3.8 prism diopters *
For the following, calculate the amount of image jump the client will experience:
FT 25 bifocal, Add: +2.50
Image Jump=
A. 12.5 prism diopters
B. 1.25 prism diopters *
C. .125 prism diopters
D. 1.50 prism diopters
The direction of the base direction for prisms is expressed in degrees from:
A. 0-360 *
B, 0-180
C. 0-270
D. 90-180
A. Round Seg
B. Flat Top
C. Executive
D. Ribbon Seg *
Which type of bifocal has the most image jump?
A. FT 25
B. Round 22
C. Ultex A *
D. Executive
For the following, calculate the amount of image jump the client will experience:
Executive bifocal, Add: +1.75
Image Jump=
A. 4.0 prism diopters
B. 2.5 prism diopters
C. zero image jump *
D. 3.8 prism diopters
A. Baseball lens
B. Round Seg
C. Flat Top
D. Executive *
Prism base 45 degrees before the right eye is the same as prism base:
A. up and out
B. up and in *
C. down and out
D. down and in
E. cannot be determined
Excessive prism base up will cause the client to see:
A. the floor appears convex *
B. the floor appears concave
C. vertical objects as being taller than they are
D. all of the above
Write the TRP from the following RX:
OD: +1.00 - 1.00 x 90
OS: +1.25 -0.75 x 65
Add: +2.50 o.u.
TRP: ?
A. OD: + 3.50
OS: +3.75
B. OD: +1.00 -1.00 x 90
OS: +1.25 -0.75 x 65
C. OD: +2.50 -1.00 x 90
OS: +2.50 -0.75 x 65
D. OD: +3.50 -1.00 x 90
OS: +3.75 -0.75 x 65 *
Transcribe the following RX into an intermediate prescription:
OD: +3.25 - 0.50 x 35
OS: +1.50 - 1.50 x 170
Add: +2.75 o.u.
Intermediate RX: ?
A. OD: +2.75
OS: +2.75
B. OD: +1.37
OS: +1.37
C. OD: +4.62 -0.50 x 35
OS: + 2.87 -1.50 x 170 *
D. OD: +4.62 -1.50 x 170
OS: +2.87 -1.50 x 35
A. Baseball lens
B. Double D lens *
C. Quadrafocal
D. Double Executive
A. Round Seg
B. Flat Top *
C. Executive
D. Ribbon Seg
The 2nd quadrant, in reference to meridian notation, has degrees ranging from:
A. 180-270
B. 0-90
C. 90-180 *
D. 270-360
